The protecting cap, code 11.01251-0048.0, serves as a protective barrier within the MAN L21/31 engine assembly, shielding sensitive components from contamination, moisture, and mechanical damage. Typically installed over exposed interfaces or fastening points, it helps preserve internal cleanliness and prevent corrosion. Manufactured from durable materials suited for harsh operational environments, the protecting cap contributes to extended service intervals and reduced maintenance needs. Its function may appear simple, but it is essential for maintaining the engine’s structural and operational integrity over time.

The auxiliary rocker stand H 27035 is a structural support component within the Sulzer ASL25 valve train assembly, designed to securely position and stabilize auxiliary rocker mechanisms. Built to withstand repetitive mechanical loading, vibration, and thermal influences, this stand ensures correct alignment and smooth operation of the rocker system. Its rigid construction and precise mounting surfaces minimize deflection and wear, contributing to accurate valve actuation, reduced mechanical stress, and long-term durability of the engine’s valve train system.

The referral valve H 27440 “NOVA” is a specialized control component integrated into the Sulzer ASL25 engine’s fluid management system, designed to regulate or redirect flow within designated circuits. Engineered for accurate response, pressure stability, and durability under continuous operational stress, this valve ensures controlled system behavior and reliable protection of downstream components. Its robust construction and precise internal geometry support consistent performance, reduced leakage, and efficient flow regulation, contributing to overall engine reliability and operational safety.

The nut H 27218 is a high-strength fastening component used in critical assemblies of the Sulzer ASL25 engine where secure clamping and long-term stability are essential. Designed to maintain consistent preload under vibration, thermal expansion, and dynamic mechanical loads, this nut ensures reliable retention of associated components. Its precision-machined threads and controlled material properties provide resistance to loosening and fatigue, safeguarding the structural integrity of the assembly. Though compact in size, the H 27218 nut plays a vital role in maintaining dependable engine performance in demanding marine and industrial environments.

The round seal ring, code 06.56936-1507.A, serves as a dependable sealing element within various systems of the MAN L21/31 engine. Engineered to withstand high pressure and thermal cycling, it ensures tight sealing between components in lubrication, cooling, or fuel circuits. Its circular geometry allows uniform load distribution, reducing the risk of deformation or leakage. Despite its modest size, this seal ring plays an indispensable role in maintaining engine cleanliness, operational efficiency, and long service life in both marine propulsion and stationary power generation applications.

The component H 40021 is a precision-manufactured element used within the Sulzer ASL25 engine’s mechanical system, designed to ensure stable interaction between associated assemblies under continuous operational load. Engineered for durability, dimensional accuracy, and resistance to vibration, this part supports reliable system performance and contributes to overall mechanical stability. Its robust construction and accurate fit help reduce wear, maintain correct alignment, and enhance long-term engine reliability in heavy-duty marine and industrial environments.

The sealing ring H 16521 is a precision sealing element engineered to provide leak-free performance in fluid and pressure interfaces within the Sulzer ASL25 engine. Manufactured from material optimized for resistance to oil, temperature variation, and vibration, it maintains reliable elasticity and sealing efficiency over extended service intervals. By preventing leakage and protecting internal components from contamination, H 16521 contributes directly to system cleanliness, operational efficiency, and the long-term durability of critical engine assemblies.

The nut H 27086 is a high-strength fastening component used in critical bolted assemblies of the Sulzer ASL25 engine. Designed to maintain consistent clamping force under vibration, thermal cycling, and continuous mechanical stress, this nut ensures secure retention of structural and functional components. Its precisely machined threads and controlled material properties provide reliable preload, resistance to loosening, and long-term dimensional stability. Although compact in size, the H 27086 nut plays an essential role in safeguarding mechanical integrity and operational reliability in demanding marine and industrial applications.

The O-ring H 16192 is a critical sealing element designed to provide leak-free sealing in fluid and pressure interfaces of the Sulzer ASL25 engine. Manufactured from elastomer optimized for resistance to oil, temperature fluctuations, and vibration, it maintains elasticity and sealing performance over extended service intervals. By preventing leakage and protecting internal components from contamination, the H 16192 O-ring plays a vital role in ensuring system integrity, efficiency, and reliable long-term engine operation.

The nut H 11152 is a high-strength fastening component used in the Sulzer ASL25 engine to secure bolted joints subjected to continuous vibration and mechanical stress. Engineered to maintain consistent clamping force under thermal cycling and dynamic loads, this nut ensures reliable retention of critical assemblies. Its precisely formed threads and controlled material properties support secure installation, resistance to loosening, and long service life, making it an essential element for maintaining structural stability and operational safety.